Redundant character shown when searching for head character "m".

[samir-memsql]

When I use ace-jump-mode, and select the head character as "m" or "e", the first iteration of position filtering shows only the key "a" on all matching words. This seems redundant to me, since no extra information is gained when I press "a" at this time. Attached is a screenshot of how this appears when I use M-x ace-jump-mode m at the top of the ace-jump-mode.el file.

I am using emacs version 24.4+1-4.1~bpo70+1 from the Debian Wheezy backports and the ace-jump-mode.el file from the master branch.